Door-check.



w. DOMINIK. DOOR CHECK.

APPLICATION FILED MAR. 27, 1909.

Patented June 29,1909.

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W. DOMINIK.

DOOR GHEGK. APILIOATION FILED MAR. 27, I909.

926,321. Patented June 29, 1909.

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WALTER DOMINIK, OF NEW YORK, N. Y.

DOOR-CHECK.

Specification of Letters Patent.

Application filed March 27, 1909.

Patented June 29, 1909.

Serial No. 486,291.

To all whom it may concern:

Be it known that I, I/VALTER DOMINIK, a subject of the German Emperor, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Doorghecks, of which the following is a specificaion.

The present invention relates to safety attachments to doors and has for its object to provide a construction, whereby the device will be made self-operative, allow of a perfect safety and be capable of being operated from the outside by means of a key.

All the well known systems of safety attachments, as safety chains or the like, the object of which is to allow the opening of the door only to a limited extent, are defective, in that the same cannot be locked or opened from the outside. The safety attachment of the present invention, however, is so constructed that the door can be opened suiliciently wide to allow of the person inside of the room to communicate with the person outside, preventing, however, the latter from pushing open the door any wider and from entering without permission.

To make my invention more clear the same is illustrated in the accompanying drawings, in which- Figure 1 is a front View; Fig. 2 a longitudinal section of the safety attachment in con nection with a safety lock Fig. 3 a front view of the safety attachment in open position; Fig. 4 a rear view of the device from which the rear plate is removed; Fig. 5 a view of the rear plate shown in the position in which it is to be placed on the left hand side of Fig. l, and Fig. 6 is a top plan view of the two parts of the safety attachment in position when the door is open.

The new safety attachment is characterized by the provision of a peculiar hooking mechanism, the two hook parts of which are so arranged and shaped that when the door is opened the same become effectively engaged. The disengagement of these parts can be easily effected from the inside. To accomplish this from the outside the manipulation of a safety look by a suitable key is required.

In the drawings 1 and 2 denote the two casings which substantially are uniform in construction, and of which one contains the ordinary locking bolt or bar 3 and the other the opening engaging the latter. The bar 3 is guided in a bracket 6 by means of guide rods 4 and 5 actuated by springs 7. At the free ends of the guide rods 4 and 5 a cross piece Sis provided, to be actuated by a thumb 9. By the turning of the knob 10 which is rigidly connected with the thumb 9, the latter causes the unlocking of the bar 3 from the opening in the case 2. This arrangement is substantially old but is slightly modified for the purpose of the present safety attachment. This safety attachment comprises two hooked levers 11 and 12, the lever 11 being pivoted at 13 in the casing 2 and the lever 12 at 14, both swinging horizontally in reverse directions. The lever 12, on the other hand, is provided with a projection 15 preventing the lever 12 from swinging away from the door and allowing it only to swing toward the door. The pivot 14 is borne in a lever 16 which is rotatively mounted on the spindle of the knob 10 (Fig. 2). From the lower surface of the lever 16 projects a pin 17 which extends into the casing 1 through a slot 18 therein, and which is adapted to limit the up and down movement of the lever 16. The levers 12 and 16 thus form together a knee capable of moving up and down, which, however, is only possible when the door is en.- tirely closed. WVhen the door is opened and the lovers 11 and 12 remain in contact, the hook portions thereof become engaged and permit the opening of the door only to an extent limited by the length of the hook portion of the lever 12 (Figs. 1 and 3 In such state it is impossible to disengage the hook portions either from the inside or from the outside. If it is desired to open the door entirely this can be accomplished in a simple manner from the inside by lifting the knee 12, 16, whereby the safety device becomes unlocked. But as soon as the door is closed again the two hooks automatically become reengaged, the nose 19 of the hook portion 11 being on top slanting. It is thus absolutely impossible for the safety device at any time to be out of engagement when the door is closed. In order to also enable the 1mlocking of the safety device from the outside the door in addition is provided with a safety 7 look of any suitable construction, as, for instance,the well known Yale lock 20 (Fig. 2). Extending from this look is a flat bar 21 which projects into a cap 23 provided on the bottom 22 of the casing 1. This cap has an oblong recess 24 for engagement of the I lat bar 21 and carries inside of the casing 1 a double thumb 25, 26 (Fig. 2), of which 25 is adapted to act against the cross piece 8 to disengage the bar 3 when it is turned. The thumb 26 acts against the pin 17 secured to the lever 16 and by the turning of the cap raises the said pin, consequently the lever 16 and lever 12, whereby the hooks are caused to unlock, permitting the opening of the door.

As a special safety for the night a small slide 27 is provided which can be moved up and down and can be secured in position by means of a screw 28 (Figs. 1, 2 and 3). In the locking position the slide rests against the rear end of the lever 16 and makes it impossible for the latter to be raised.

It is understood that the construction of the safety device shown is only an example and the same as well as the rest can be easily modified by those skilled in the art without deviating from the spirit of my invention.

hat I claim and desire to secure by Letters Patent is 1. In a safety device for doors, two cooperating hooked levers capable of swinging horizontally in reverse direction to one another, and a lever to which one of said hooked levers is pivoted and which when the door is closed is capable of being raised.

2. In a safety device for doors, two cooperating hooked levers capable of swinging horizontally in reverse direction to one another, a lever to which one of said hooked levers is pivoted and which when the door is closed is capable of being raised, and a proj ection on the said latter hooked lever which prevents it from swinging away from the door.

In safety device for doors, two cooperating hooked levers capable of swinging horizontally in reverse direction to one another, a lever to which one of said hooked levers is pivoted and which when the door is closed is capable of being raised, and means for limiting the up and down movement of said latter lever.

4. In a safety device for doors, two cooperating hooked levers, the hook portion of one being slanting, said levers being capable of swinging horizontally in reverse direction to one another and when in contact of limiting the extent to which the door can be opened, a lever to which one of said hooked levers is pivoted and which when the door is closed is capable of being raised to disengage the hooks.

5. In a safety device for doors, the combi nation with a safety lock and the casings thereof, of two cooperating hooked levers, of which one is pivoted 011 the outside of one of said casings, a lever mounted on the outside of the other casing to swing vertically and having the other hooked lever pivoted to and forming a knee with it, the said knee be ing capable of being raised when the door is closed, and means connected with the safety lock for the operation of the said knee by the manipulation of the lock.

6. In a safety device for doors, the combi nation with a safety lock and the casings thereof, of two cooperating hooked levers, of which one is pivoted on the outside of one of said casings, a lever mounted on the outside of the other casing to swing vertically and having the other hooked lever pivoted to and forming a knee with it, the said knee being capable of being raised when the door is closed, a rotary cap, means connected with the safety lock and engaging the said cap, and means on said cap for operating the above named knee by the manipulation of the lock.

7. In a safety device for doors, the combination with a safety lock and the casings thereof, of two cooperating hooked levers, of which one is pivoted on the outside of one of said casings, a lever mounted on the outside of the other casing to swing vertically, a projection on said lever, the second hooked lever being pivoted to the latter and forming a knee therewith, a rotary cap, a bar connected with the safety lock and engaging the said cap and a thumb on the cap which when turned is adapted to act against the said pin, and thereby raise the knee by the manipulation of the safety look.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER DOMINIK.

\Vitnesses:

Josnrir E. CAVANAUGH, MAX D. OLDMAN. 

